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4K Ultra HD Audio


If you bought your 4K Ultra HD TV at Best Buy, you know that it already includes the advanced technology you need to display breathtaking 4K images from 4K Blu-ray players, 4K streaming media players and more. Upgrading your audio components now will not only help integrate your current 4K components, but also increase your home theater's flexibility in the future. And you'll be ready for even more 4K devices, like video cameras, video games and more.

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4K technology refers exclusively to video quality — images on a screen. So why should you upgrade your audio equipment? Well, if your 4K Ultra HD television is connected to a home theater system including a receiver, your home theater components must include the correct technology to display a 4K image on your screen. Or, it must be able to include 4K audio "pass through." For a fully-integrated 4K system, two technology specs are required on your equipment: HDCP 2.2 software and HDMI 2.0 ports.


HDCP 2.2

HDCP stands for High-bandwidth Digital Content Protection, a copy protection technology that provides a secure "handshake" between the content source (for instance, your 4K Blu-ray player) and display (your 4K television) via encryption techniques. A receiver connected between the Blu-ray player and TV must be able to interpret these encryption keys and pass the signal between the two.

The latest version — HDCP 2.2 — is designed for 4K content copy protection. In a 4K home theater setup, it's important that any audio component — like a receiver or sound bar — inserted in the home theater system must also be able to pass the 4K encrypted signal between the source and display. Otherwise, you won't experience a 4K picture.


HDMI 2.0

A fully 4K-compliant receiver has HDMI 2.0 ports, which allow passage of bandwidth-hungry 4K signals. The good news is that HDMI 2.0 is backward-compatible with previous HDMI versions, so you can connect older sources, like a regular Blu-ray player or a cable box (which may have regular and not HDMI 2.0 ports) directly to a new 4K Ultra HD TV and enjoy an upscaled picture.

You may be able to use existing HDMI cables with your new components as well. Just make sure they are considered "high-speed" HDMI cables.


If you plan on using your receiver as the hub of your complete home theater system, connecting both your 4K Ultra HD TV and other components or content sources, it should contain both HDCP 2.2 technology and HDMI 2.0 ports, since all components in the chain must be able to recognize and pass the audio and video digital "handshake" from the content source back and forth to the television display.

Some receivers allow 4K audio pass-through but do not have HDCP 2.2 technology or HDMI 2.0 ports. In this case, only the audio from your content source can be routed through the receiver and you must connect the video directly to the 4K Ultra HD TV.

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If you use a sound bar with your current home theater setup, and you've connected the sound bar directly to the TV, you won't need to purchase a new 4K-compatible model. However, if the sound bar is connected between the content source (4K Blu-ray player, cable box) and your TV, it needs to be 4K-compliant.

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